One of the important things to keep in mind is that Orphism is an umbrella term beneath which gather a number of similar but disparate traditions. This is why I am always careful to specify that the Starry Bull tradition is a branch of Bacchic Orphism. Partly this has to do with the primary divinities honored — in Crete, Athens and Platonism it’s Zeus, in Pythagoreanism and Hyperborea it’s Apollon, in Southern Italy it’s Persephone and Dionysos, in Thrace it’s a syncretic Dionysos-Apollon/Helios or Sabazios and in various locales it’s Demeter or Rheia/Kybele. Each of these has its own customs, practices, tabboos, beliefs (sometimes including cosmology and eschatology) which can make generalizing about Orphism both difficult and problematic. Hence why so much of the literature on the subject is misleading or simply wrong. And while these may be the most prominent deities in their respective traditions don’t for a moment think they’re the only ones; Orphism is one of the hardest of ancient polytheisms, often separating divinities I tend to lump together or incorporating local indigenous divinities. I’m simplifying this for the sake of discussion.